TITLE : COLD SWIRLING-FLOW FURNACE SIMULATION
BY: M R Malin & S Semin - CHAM Development Team
O Olsvik - STATOIL, RTD, Norway
PURPOSE OF THE CALCULATIONS:
- The problem considered is 2-dimensional axisymmetric, steady, turbulent
isothermal swirling flow in the laboratory furnace of Weber et al (Int.J.
Heat and Fluid Flow, Vol.11, No.3, p225 (1990)).
- The main objective of the calculations is to validate both the staggered-
BFC momentum equations and the turbulence modelling for swirling flow.
- The calculations are a precursor to applying the PHOENICS extended SCRS
attachment to swirling gaseous combustion in an industrial furnace.
FLOW AND COMPUTATIONAL DETAILS :
- The flow geometry consists of a solid-body vortex generator of 0.19m
diameter, a 20-degree conical burner quarl with an expansion ratio of 2,
and a cylindrical furnace of 0.44m diameter.
- The flow Reynolds number was about 50,000 with an inlet vortex of 0.75
swirl number and low turbulence intensity (1%).
- The flow is simulated using a 2d axisymmetric staggered BFC system by means
of the recently-developed GROUND attachment for solving the momentum
equations on 2d BFC staggered meshes with swirl.
- The turbulence is represented by use of the two-equation KE-EP turbulence
model of Chen and Kim .
- A mesh of 28 radial cells by 82 axial cells is used for a computational
domain length of 4m.
Pictures are as follows:
Close up of the computational grid at the furnace entrance
Axial velocity profiles at Z=0.19m
Axial velocity profiles at Z=0.34m
Axial velocity profiles at Z=0.45m
Axial velocity profiles at Z=0.58m
Axial velocity profiles at Z=0.75m